Cell C Unfair treatment

In the beginning of January I bought a Samsung A7 (2018) phone with cell c. After about 3 days of using it I noticed that the phones battery life is not that strong, I then went back to cell c with this matter and all that they told me was there is nothing wrong it is just all my apps eating the battery. I then went on like normal for about a week thereafter.

One day during that week when I went to charge my phone I plugged it in the wall using the charger that cell c has provided with the phone. I putted it on charge and then I heard a funny electricity sound coming from my phone. I then took out the charger and there came smoke from my charger. From that day my phone did not charge to full at all and the battery also did not last

The next day I took it to my cell c store and asked them to book it in for me and I told them what happened. The lady that booked in my phone booked it in " out of warranty" which was not true because I bought the phone in January 2019 and it has 2 year warranty as it states on my contract.

After a few days cell c repair centre phoned me to state that I need to pay R 820 for a new battery because I have damaged my phone they said that the plate was burnt which was because of the charger I told them that my phone is under warranty which should not be a problem to fix but then they informed me that it was never booked in like that so I need to pay. when I phoned the complaints department they informed me that my phone has water damage which is also not true because I did not even book it in for that problem so they gave me different findings.

it has been a month now today 26/03/2019 that I have been sitting without a phone and cell c not wanting to fix it. I went to fetch it today after I received a confirmation SMS that it is back at my booking point, I did not asked them to send it back they just did and I am even more furious then before my phone is in a terrible condition, definitely not the way I send it off. They did not close my phone properly so it is dent on the side witch was not there because my phone is still in brand new condition.

They also informed me that they are not going to book it in again ( it was not fixed it is still not working) that I need to drive to cell c in mall of Africa and go book it in there by myself.

This is really poor service and I am really not happy at all.